Outside of the main season
There are a lot of arguments to choose dates outside of the main season or not in the school holidays: It is quieter generally, the temperatures are not so hot, and of course the prices are cheaper as during the main holidays.
If you are not bound to have to travel in the main season, a world of interesting possibilities opens to you. There are endless activities that can be done in Mallorca during the lower season… and of course also just staying at the villa is one of them!